An investigation of the undesirable delayed action, or lag, of the spoiler-type lateral control device led to the development of the NACA slot-lip aileron. The tests were made in the 7- by 10-foot wind tunnel with a 4- by 8-foot wing hinged at the tunnel jet boundary and taken of the motion of the control device under test and of the resulting wing motion. First, the lag, as affected by the fore-and-aft location of retractable ailerons or spoilers was determined. The lag was found to increase regularly as the spoiler was moved from the rear of the wing toward the front. Then a combination of spoilers and fixed slot was developed that, with the spoiler retracting into the forward part of the slot, reduced the time lag to a negligible value. In addition, an arrangement was developed using a hinged aileron-type flap as the upper portion, or lip, of a slot through the wing. This arrangement appears to be usable as a form of lateral control device that shows promise of giving improved control and stability at the high angles of attack through stall, with negligible lag, low control forces, and relatively simple construction.
Development of the NACA slot-lip aileron
1935-11-01
Miscellaneous
No indication
English
Development of the NACA slot lip [aileron]
SLUB | 1935
|Development of N.A.C.A. Slot-lip aileron
Engineering Index Backfile | 1935
|Wind-tunnel investigation of spoiler-slot aileron on NACA 23012 airfoil with full-span fowler flap
Engineering Index Backfile | 1941
|Development of the N.A.C.A. slot-lip aileron
TIBKAT | 1935
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